MemeLord257 gave me this request and I had so much fun with it!

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There was something wrong in the Mountain. It was quiet. The Mountain was only this quiet when they were asleep. None of them were asleep. Everyone was supposed to be at the Mountain today so how was it so quiet? Unless not everyone was present. "Has anyone seen Wally or Rob? They were supposed to be training but their not in the gym or the ring," Kaldur asked. They shook their heads. Oh, that's why it was quiet. 

"Now you've said that I haven't seen them since Roy showed up," Artemis answered, practically hissing Roy's name. They still weren't on the best of terms but they could tolerate each other for an hour or two. The only positive thing about their relationship was that they hated each other equally. "Didn't Flash mention that they should have some sort of supervision whenever they were together?" Connor said. They tensed up. Flash did say that. He specifically said for them to keep an eye on them and stop them before they got too rowdy. 

"I'm sure they couldn't get into too much trouble," M'gann replied. They looked at her with a deadpan stare. This was Wally, the most chaotic teenager alive, Robin, the most feral teenager alive, and Roy who just encouraged them for the fun of it. "Okay, maybe we should look for them."

They checked the entire Mountain, even double-checking places Kaldur had already done and climbing into the vents. Still, their search came up empty. "Perhaps they're outside?" M'gann suggested. It was the only place left unless they decided to Zetatube somewhere. Then they could be anywhere causing trouble. "But it's freezing out there. It's been snowing all night," Kaldur pointed out before thinking to himself. Wait what do chaotic and feral kids like when it got to this time of year? Snow. What would someone who encouraged these kids to be at their worst suggest? A snowball fight. "They're outside," he stated. They rushed outside and found exactly who they were looking for in the midst of an intense snowball fight. Robin was crouched up on the rocks with a pile of snowballs beside him and a wall made of snow to protect him. He was putting smoke bombs in some of the snowballs for extra effectiveness. Wally was hucking snowballs at Roy with no hesitation even when he was hiding behind a rock. He just ran around it and threw them. "Hey, no powers!" Roy shouted whilst he tried to make snowballs to defend himself. 

"I'm just being tactical," Wally argued.

"Hey, Wally!" Robin called. The ginger turned, momentarily forgetting that they were in battle, and was met with a smoke snowball to the face. He coughed and spluttered as he was attacked with fifteen other snowballs. "That was dirty," the ginger complained as the smoke cleared. "I'm JuST BeINg TActiCAL," Robin mocked. "Nonmutants unite!" He jumped down from his safe zone with the rest of his snowballs and pelted the speedster with them. Roy helped him with his own snowballs allowing them to pull off a full-scale double attack that would leave their foe defeated. Only when the smoke cleared and they were out of snowballs, Wally still stood. "Nani?" Robin exclaimed.

"You think you can defeat me? Whilst you played your last card," he ran off and came back with a pile full of snowballs. "I was making mine."

"Roy save yourself!" Wally spun around at top speed whilst throwing his snowballs at an alarming rate. They were caught off guard by the attack and only Roy could find cover to save himself from the worst of it. Robin dramatically fell to the ground after being sent to flying to the snowbank. "NOOOOO!" Roy yelled. When the snowballs died down, he ran across to his fallen friend and with tears in his eyes held him close. "What have I done?" Wally asked as the scene of his friends came into view. "He was so young!" Robin giggled and sat up, causing the others to laugh too. This was the only time the team ever saw Roy laugh. It was so weird but oddly nice to see. He proved that he wasn't some cold-hearted bitter hero who left his best friends and didn't care that they wanted him to be on the team. "I'm sorry I couldn't hold it in anymore," Robin snickered.

"What the fuck guys?" Artemis stated.

The teenagers turned to the team they hadn't noticed before, their faces glowing bright red. "Uh, we can explain," Wally began.

"You said you were training," Kaldur said, still trying to get over what he just saw.

"This is training," Robin replied. The other two nodded furiously. This wasn't training. This was the only place they could play this game without people finding out but it appeared they were wrong. "Uh-huh, sure," Artemis replied skeptically.

"So imma just head out," Wally said as he got up off his knees. As he did, he was hit in the face with a snowball. M'gann grinned at him with another snowball in her hand. 

"I must avenge my fallen brethren," she told him with a stern voice. The three boys grinned back at her. "Round 2!"

When Flash and Batman came to pick up their protege's for their patrol, they came across the whole team passed out on the various couches and chairs. "Told you this would happen," Batman stated.